Assistant United States Attorney U.S. Department of JusticeAssistant United States AttorneySanta Ana, CA$114,525–$197,100 / yearCongress generally prohibits agencies from employing non-citizens within the United States, except for a few narrow exceptions as set forth in the annual Appropriations Act (see, https://www.usajobs.gov/Help/working-in-government/non-citizens/). Assistant United States Attorneys in the Criminal Division prosecute federal cases in the Central District of California and advise federal law enforcement agents on investigations, present cases to the grand jury, try cases before the United States District Court, and represent the United States in criminal appeals before the Ninth Circuit Court of Appeals.